Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * drivers/video/geode/gx1fb_core.c | |
3 | * -- Geode GX1 framebuffer driver | |
4 | * | |
5 | * Copyright (C) 2005 Arcom Control Systems Ltd. | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | */ | |
12 | ||
13 | #include <linux/module.h> | |
14 | #include <linux/kernel.h> | |
15 | #include <linux/errno.h> | |
16 | #include <linux/string.h> | |
17 | #include <linux/mm.h> | |
1da177e4 LT |
18 | #include <linux/delay.h> |
19 | #include <linux/fb.h> | |
20 | #include <linux/init.h> | |
21 | #include <linux/pci.h> | |
22 | ||
23 | #include "geodefb.h" | |
24 | #include "display_gx1.h" | |
25 | #include "video_cs5530.h" | |
26 | ||
27 | static char mode_option[32] = "640x480-16@60"; | |
28 | static int crt_option = 1; | |
29 | static char panel_option[32] = ""; | |
30 | ||
53eed4ec DV |
31 | /* Modes relevant to the GX1 (taken from modedb.c) */ |
32 | static const struct fb_videomode __initdata gx1_modedb[] = { | |
33 | /* 640x480-60 VESA */ | |
34 | { NULL, 60, 640, 480, 39682, 48, 16, 33, 10, 96, 2, | |
35 | 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA }, | |
36 | /* 640x480-75 VESA */ | |
37 | { NULL, 75, 640, 480, 31746, 120, 16, 16, 01, 64, 3, | |
38 | 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA }, | |
39 | /* 640x480-85 VESA */ | |
40 | { NULL, 85, 640, 480, 27777, 80, 56, 25, 01, 56, 3, | |
41 | 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA }, | |
42 | /* 800x600-60 VESA */ | |
43 | { NULL, 60, 800, 600, 25000, 88, 40, 23, 01, 128, 4, | |
44 | FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, | |
45 | FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA }, | |
46 | /* 800x600-75 VESA */ | |
47 | { NULL, 75, 800, 600, 20202, 160, 16, 21, 01, 80, 3, | |
48 | FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, | |
49 | FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA }, | |
50 | /* 800x600-85 VESA */ | |
51 | { NULL, 85, 800, 600, 17761, 152, 32, 27, 01, 64, 3, | |
52 | FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, | |
53 | FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA }, | |
54 | /* 1024x768-60 VESA */ | |
55 | { NULL, 60, 1024, 768, 15384, 160, 24, 29, 3, 136, 6, | |
56 | 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA }, | |
57 | /* 1024x768-75 VESA */ | |
58 | { NULL, 75, 1024, 768, 12690, 176, 16, 28, 1, 96, 3, | |
59 | FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, | |
60 | FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA }, | |
61 | /* 1024x768-85 VESA */ | |
62 | { NULL, 85, 1024, 768, 10582, 208, 48, 36, 1, 96, 3, | |
63 | FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, | |
64 | FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA }, | |
65 | /* 1280x960-60 VESA */ | |
66 | { NULL, 60, 1280, 960, 9259, 312, 96, 36, 1, 112, 3, | |
67 | FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, | |
68 | FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA }, | |
69 | /* 1280x960-85 VESA */ | |
70 | { NULL, 85, 1280, 960, 6734, 224, 64, 47, 1, 160, 3, | |
71 | FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, | |
72 | FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA }, | |
73 | /* 1280x1024-60 VESA */ | |
74 | { NULL, 60, 1280, 1024, 9259, 248, 48, 38, 1, 112, 3, | |
75 | FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, | |
76 | FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA }, | |
77 | /* 1280x1024-75 VESA */ | |
78 | { NULL, 75, 1280, 1024, 7407, 248, 16, 38, 1, 144, 3, | |
79 | FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, | |
80 | FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA }, | |
81 | /* 1280x1024-85 VESA */ | |
82 | { NULL, 85, 1280, 1024, 6349, 224, 64, 44, 1, 160, 3, | |
83 | FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, | |
84 | FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA }, | |
85 | }; | |
86 | ||
1da177e4 LT |
87 | static int gx1_line_delta(int xres, int bpp) |
88 | { | |
89 | int line_delta = xres * (bpp >> 3); | |
90 | ||
91 | if (line_delta > 2048) | |
92 | line_delta = 4096; | |
93 | else if (line_delta > 1024) | |
94 | line_delta = 2048; | |
95 | else | |
96 | line_delta = 1024; | |
97 | return line_delta; | |
98 | } | |
99 | ||
100 | static int gx1fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info) | |
101 | { | |
102 | struct geodefb_par *par = info->par; | |
103 | ||
1da177e4 LT |
104 | /* Maximum resolution is 1280x1024. */ |
105 | if (var->xres > 1280 || var->yres > 1024) | |
106 | return -EINVAL; | |
107 | ||
108 | if (par->panel_x && (var->xres > par->panel_x || var->yres > par->panel_y)) | |
109 | return -EINVAL; | |
110 | ||
111 | /* Only 16 bpp and 8 bpp is supported by the hardware. */ | |
112 | if (var->bits_per_pixel == 16) { | |
113 | var->red.offset = 11; var->red.length = 5; | |
114 | var->green.offset = 5; var->green.length = 6; | |
115 | var->blue.offset = 0; var->blue.length = 5; | |
116 | var->transp.offset = 0; var->transp.length = 0; | |
117 | } else if (var->bits_per_pixel == 8) { | |
118 | var->red.offset = 0; var->red.length = 8; | |
119 | var->green.offset = 0; var->green.length = 8; | |
120 | var->blue.offset = 0; var->blue.length = 8; | |
121 | var->transp.offset = 0; var->transp.length = 0; | |
122 | } else | |
123 | return -EINVAL; | |
124 | ||
125 | /* Enough video memory? */ | |
126 | if (gx1_line_delta(var->xres, var->bits_per_pixel) * var->yres > info->fix.smem_len) | |
127 | return -EINVAL; | |
128 | ||
129 | /* FIXME: Check timing parameters here? */ | |
130 | ||
131 | return 0; | |
132 | } | |
133 | ||
134 | static int gx1fb_set_par(struct fb_info *info) | |
135 | { | |
136 | struct geodefb_par *par = info->par; | |
137 | ||
35887b1c | 138 | if (info->var.bits_per_pixel == 16) |
1da177e4 | 139 | info->fix.visual = FB_VISUAL_TRUECOLOR; |
35887b1c | 140 | else |
1da177e4 | 141 | info->fix.visual = FB_VISUAL_PSEUDOCOLOR; |
1da177e4 LT |
142 | |
143 | info->fix.line_length = gx1_line_delta(info->var.xres, info->var.bits_per_pixel); | |
144 | ||
145 | par->dc_ops->set_mode(info); | |
146 | ||
147 | return 0; | |
148 | } | |
149 | ||
150 | static inline u_int chan_to_field(u_int chan, struct fb_bitfield *bf) | |
151 | { | |
152 | chan &= 0xffff; | |
153 | chan >>= 16 - bf->length; | |
154 | return chan << bf->offset; | |
155 | } | |
156 | ||
157 | static int gx1fb_setcolreg(unsigned regno, unsigned red, unsigned green, | |
158 | unsigned blue, unsigned transp, | |
159 | struct fb_info *info) | |
160 | { | |
161 | struct geodefb_par *par = info->par; | |
162 | ||
163 | if (info->var.grayscale) { | |
164 | /* grayscale = 0.30*R + 0.59*G + 0.11*B */ | |
165 | red = green = blue = (red * 77 + green * 151 + blue * 28) >> 8; | |
166 | } | |
167 | ||
168 | /* Truecolor has hardware independent palette */ | |
169 | if (info->fix.visual == FB_VISUAL_TRUECOLOR) { | |
170 | u32 *pal = info->pseudo_palette; | |
171 | u32 v; | |
172 | ||
173 | if (regno >= 16) | |
174 | return -EINVAL; | |
175 | ||
176 | v = chan_to_field(red, &info->var.red); | |
177 | v |= chan_to_field(green, &info->var.green); | |
178 | v |= chan_to_field(blue, &info->var.blue); | |
179 | ||
180 | pal[regno] = v; | |
181 | } else { | |
182 | if (regno >= 256) | |
183 | return -EINVAL; | |
184 | ||
185 | par->dc_ops->set_palette_reg(info, regno, red, green, blue); | |
186 | } | |
187 | ||
188 | return 0; | |
189 | } | |
190 | ||
191 | static int gx1fb_blank(int blank_mode, struct fb_info *info) | |
192 | { | |
193 | struct geodefb_par *par = info->par; | |
194 | ||
195 | return par->vid_ops->blank_display(info, blank_mode); | |
196 | } | |
197 | ||
53eed4ec | 198 | static int __init gx1fb_map_video_memory(struct fb_info *info, struct pci_dev *dev) |
1da177e4 LT |
199 | { |
200 | struct geodefb_par *par = info->par; | |
201 | unsigned gx_base; | |
202 | int fb_len; | |
53eed4ec | 203 | int ret; |
1da177e4 LT |
204 | |
205 | gx_base = gx1_gx_base(); | |
206 | if (!gx_base) | |
207 | return -ENODEV; | |
208 | ||
53eed4ec DV |
209 | ret = pci_enable_device(dev); |
210 | if (ret < 0) | |
211 | return ret; | |
1da177e4 | 212 | |
a80da738 | 213 | ret = pci_request_region(dev, 0, "gx1fb (video)"); |
53eed4ec DV |
214 | if (ret < 0) |
215 | return ret; | |
3c36aa5c | 216 | par->vid_regs = pci_ioremap_bar(dev, 0); |
1da177e4 LT |
217 | if (!par->vid_regs) |
218 | return -ENOMEM; | |
219 | ||
53eed4ec DV |
220 | if (!request_mem_region(gx_base + 0x8300, 0x100, "gx1fb (display controller)")) |
221 | return -EBUSY; | |
1da177e4 LT |
222 | par->dc_regs = ioremap(gx_base + 0x8300, 0x100); |
223 | if (!par->dc_regs) | |
224 | return -ENOMEM; | |
225 | ||
1da177e4 LT |
226 | if ((fb_len = gx1_frame_buffer_size()) < 0) |
227 | return -ENOMEM; | |
a80da738 | 228 | info->fix.smem_start = gx_base + 0x800000; |
1da177e4 LT |
229 | info->fix.smem_len = fb_len; |
230 | info->screen_base = ioremap(info->fix.smem_start, info->fix.smem_len); | |
231 | if (!info->screen_base) | |
232 | return -ENOMEM; | |
233 | ||
53eed4ec DV |
234 | dev_info(&dev->dev, "%d Kibyte of video memory at 0x%lx\n", |
235 | info->fix.smem_len / 1024, info->fix.smem_start); | |
1da177e4 LT |
236 | |
237 | return 0; | |
238 | } | |
239 | ||
240 | static int parse_panel_option(struct fb_info *info) | |
241 | { | |
242 | struct geodefb_par *par = info->par; | |
243 | ||
244 | if (strcmp(panel_option, "") != 0) { | |
245 | int x, y; | |
246 | char *s; | |
247 | x = simple_strtol(panel_option, &s, 10); | |
248 | if (!x) | |
249 | return -EINVAL; | |
250 | y = simple_strtol(s + 1, NULL, 10); | |
251 | if (!y) | |
252 | return -EINVAL; | |
253 | par->panel_x = x; | |
254 | par->panel_y = y; | |
255 | } | |
256 | return 0; | |
257 | } | |
258 | ||
259 | static struct fb_ops gx1fb_ops = { | |
260 | .owner = THIS_MODULE, | |
261 | .fb_check_var = gx1fb_check_var, | |
262 | .fb_set_par = gx1fb_set_par, | |
263 | .fb_setcolreg = gx1fb_setcolreg, | |
264 | .fb_blank = gx1fb_blank, | |
265 | /* No HW acceleration for now. */ | |
266 | .fb_fillrect = cfb_fillrect, | |
267 | .fb_copyarea = cfb_copyarea, | |
268 | .fb_imageblit = cfb_imageblit, | |
1da177e4 LT |
269 | }; |
270 | ||
53eed4ec | 271 | static struct fb_info * __init gx1fb_init_fbinfo(struct device *dev) |
1da177e4 | 272 | { |
1da177e4 | 273 | struct geodefb_par *par; |
53eed4ec | 274 | struct fb_info *info; |
1da177e4 LT |
275 | |
276 | /* Alloc enough space for the pseudo palette. */ | |
53eed4ec | 277 | info = framebuffer_alloc(sizeof(struct geodefb_par) + sizeof(u32) * 16, dev); |
1da177e4 LT |
278 | if (!info) |
279 | return NULL; | |
280 | ||
281 | par = info->par; | |
282 | ||
283 | strcpy(info->fix.id, "GX1"); | |
284 | ||
285 | info->fix.type = FB_TYPE_PACKED_PIXELS; | |
286 | info->fix.type_aux = 0; | |
287 | info->fix.xpanstep = 0; | |
288 | info->fix.ypanstep = 0; | |
289 | info->fix.ywrapstep = 0; | |
290 | info->fix.accel = FB_ACCEL_NONE; | |
291 | ||
292 | info->var.nonstd = 0; | |
293 | info->var.activate = FB_ACTIVATE_NOW; | |
294 | info->var.height = -1; | |
295 | info->var.width = -1; | |
296 | info->var.accel_flags = 0; | |
297 | info->var.vmode = FB_VMODE_NONINTERLACED; | |
298 | ||
299 | info->fbops = &gx1fb_ops; | |
300 | info->flags = FBINFO_DEFAULT; | |
301 | info->node = -1; | |
302 | ||
303 | info->pseudo_palette = (void *)par + sizeof(struct geodefb_par); | |
304 | ||
305 | info->var.grayscale = 0; | |
306 | ||
307 | /* CRT and panel options */ | |
308 | par->enable_crt = crt_option; | |
309 | if (parse_panel_option(info) < 0) | |
53eed4ec | 310 | printk(KERN_WARNING "gx1fb: invalid 'panel' option -- disabling flat panel\n"); |
1da177e4 LT |
311 | if (!par->panel_x) |
312 | par->enable_crt = 1; /* fall back to CRT if no panel is specified */ | |
313 | ||
35887b1c AS |
314 | if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) { |
315 | framebuffer_release(info); | |
316 | return NULL; | |
317 | } | |
1da177e4 LT |
318 | return info; |
319 | } | |
320 | ||
53eed4ec | 321 | static int __init gx1fb_probe(struct pci_dev *pdev, const struct pci_device_id *id) |
1da177e4 | 322 | { |
53eed4ec | 323 | struct geodefb_par *par; |
1da177e4 | 324 | struct fb_info *info; |
1da177e4 LT |
325 | int ret; |
326 | ||
53eed4ec | 327 | info = gx1fb_init_fbinfo(&pdev->dev); |
1da177e4 LT |
328 | if (!info) |
329 | return -ENOMEM; | |
1da177e4 LT |
330 | par = info->par; |
331 | ||
332 | /* GX1 display controller and CS5530 video device */ | |
333 | par->dc_ops = &gx1_dc_ops; | |
334 | par->vid_ops = &cs5530_vid_ops; | |
335 | ||
53eed4ec DV |
336 | if ((ret = gx1fb_map_video_memory(info, pdev)) < 0) { |
337 | dev_err(&pdev->dev, "failed to map frame buffer or controller registers\n"); | |
1da177e4 LT |
338 | goto err; |
339 | } | |
340 | ||
53eed4ec DV |
341 | ret = fb_find_mode(&info->var, info, mode_option, |
342 | gx1_modedb, ARRAY_SIZE(gx1_modedb), NULL, 16); | |
1da177e4 | 343 | if (ret == 0 || ret == 4) { |
53eed4ec | 344 | dev_err(&pdev->dev, "could not find valid video mode\n"); |
1da177e4 LT |
345 | ret = -EINVAL; |
346 | goto err; | |
347 | } | |
348 | ||
349 | /* Clear the frame buffer of garbage. */ | |
350 | memset_io(info->screen_base, 0, info->fix.smem_len); | |
351 | ||
352 | gx1fb_check_var(&info->var, info); | |
353 | gx1fb_set_par(info); | |
354 | ||
355 | if (register_framebuffer(info) < 0) { | |
356 | ret = -EINVAL; | |
357 | goto err; | |
358 | } | |
53eed4ec | 359 | pci_set_drvdata(pdev, info); |
1da177e4 LT |
360 | printk(KERN_INFO "fb%d: %s frame buffer device\n", info->node, info->fix.id); |
361 | return 0; | |
362 | ||
363 | err: | |
53eed4ec | 364 | if (info->screen_base) { |
1da177e4 | 365 | iounmap(info->screen_base); |
53eed4ec DV |
366 | pci_release_region(pdev, 0); |
367 | } | |
368 | if (par->vid_regs) { | |
1da177e4 | 369 | iounmap(par->vid_regs); |
53eed4ec DV |
370 | pci_release_region(pdev, 1); |
371 | } | |
372 | if (par->dc_regs) { | |
1da177e4 | 373 | iounmap(par->dc_regs); |
53eed4ec DV |
374 | release_mem_region(gx1_gx_base() + 0x8300, 0x100); |
375 | } | |
376 | ||
35887b1c AS |
377 | if (info) { |
378 | fb_dealloc_cmap(&info->cmap); | |
1da177e4 | 379 | framebuffer_release(info); |
35887b1c AS |
380 | } |
381 | ||
1da177e4 LT |
382 | return ret; |
383 | } | |
384 | ||
53eed4ec | 385 | static void gx1fb_remove(struct pci_dev *pdev) |
1da177e4 | 386 | { |
53eed4ec DV |
387 | struct fb_info *info = pci_get_drvdata(pdev); |
388 | struct geodefb_par *par = info->par; | |
1da177e4 LT |
389 | |
390 | unregister_framebuffer(info); | |
391 | ||
392 | iounmap((void __iomem *)info->screen_base); | |
53eed4ec DV |
393 | pci_release_region(pdev, 0); |
394 | ||
1da177e4 | 395 | iounmap(par->vid_regs); |
53eed4ec DV |
396 | pci_release_region(pdev, 1); |
397 | ||
1da177e4 | 398 | iounmap(par->dc_regs); |
53eed4ec | 399 | release_mem_region(gx1_gx_base() + 0x8300, 0x100); |
1da177e4 | 400 | |
35887b1c | 401 | fb_dealloc_cmap(&info->cmap); |
53eed4ec | 402 | pci_set_drvdata(pdev, NULL); |
1da177e4 LT |
403 | |
404 | framebuffer_release(info); | |
405 | } | |
406 | ||
c7b54477 AD |
407 | #ifndef MODULE |
408 | static void __init gx1fb_setup(char *options) | |
409 | { | |
410 | char *this_opt; | |
411 | ||
412 | if (!options || !*options) | |
413 | return; | |
414 | ||
415 | while ((this_opt = strsep(&options, ","))) { | |
416 | if (!*this_opt) | |
417 | continue; | |
418 | ||
419 | if (!strncmp(this_opt, "mode:", 5)) | |
420 | strlcpy(mode_option, this_opt + 5, sizeof(mode_option)); | |
421 | else if (!strncmp(this_opt, "crt:", 4)) | |
422 | crt_option = !!simple_strtoul(this_opt + 4, NULL, 0); | |
423 | else if (!strncmp(this_opt, "panel:", 6)) | |
424 | strlcpy(panel_option, this_opt + 6, sizeof(panel_option)); | |
425 | else | |
426 | strlcpy(mode_option, this_opt, sizeof(mode_option)); | |
427 | } | |
428 | } | |
429 | #endif | |
430 | ||
53eed4ec DV |
431 | static struct pci_device_id gx1fb_id_table[] = { |
432 | { PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_5530_VIDEO, | |
433 | PCI_ANY_ID, PCI_ANY_ID, PCI_BASE_CLASS_DISPLAY << 16, | |
434 | 0xff0000, 0 }, | |
435 | { 0, } | |
436 | }; | |
437 | ||
438 | MODULE_DEVICE_TABLE(pci, gx1fb_id_table); | |
439 | ||
440 | static struct pci_driver gx1fb_driver = { | |
441 | .name = "gx1fb", | |
442 | .id_table = gx1fb_id_table, | |
443 | .probe = gx1fb_probe, | |
444 | .remove = gx1fb_remove, | |
445 | }; | |
446 | ||
447 | static int __init gx1fb_init(void) | |
448 | { | |
449 | #ifndef MODULE | |
c7b54477 AD |
450 | char *option = NULL; |
451 | ||
452 | if (fb_get_options("gx1fb", &option)) | |
53eed4ec | 453 | return -ENODEV; |
c7b54477 | 454 | gx1fb_setup(option); |
53eed4ec DV |
455 | #endif |
456 | return pci_register_driver(&gx1fb_driver); | |
457 | } | |
458 | ||
459 | static void __exit gx1fb_cleanup(void) | |
460 | { | |
461 | pci_unregister_driver(&gx1fb_driver); | |
462 | } | |
463 | ||
1da177e4 LT |
464 | module_init(gx1fb_init); |
465 | module_exit(gx1fb_cleanup); | |
466 | ||
467 | module_param_string(mode, mode_option, sizeof(mode_option), 0444); | |
468 | MODULE_PARM_DESC(mode, "video mode (<x>x<y>[-<bpp>][@<refr>])"); | |
469 | ||
470 | module_param_named(crt, crt_option, int, 0444); | |
471 | MODULE_PARM_DESC(crt, "enable CRT output. 0 = off, 1 = on (default)"); | |
472 | ||
473 | module_param_string(panel, panel_option, sizeof(panel_option), 0444); | |
474 | MODULE_PARM_DESC(panel, "size of attached flat panel (<x>x<y>)"); | |
475 | ||
476 | MODULE_DESCRIPTION("framebuffer driver for the AMD Geode GX1"); | |
477 | MODULE_LICENSE("GPL"); |